string(312) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8E%86%E5%B1%8A%E5%A5%A5%E8%BF%90%E4%BC%9A%E4%B8%BE%E5%8A%9E%E7%9A%84%E6%97%B6%E9%97%B4%E5%92%8C%E5%9F%8E%E5%B8%82%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 125.88.227.171 port 38114: Connection refused"
历届奥运会举办的时间和城市有哪些
